Home Web Front-end JS Tutorial How to get barcode from image using JavaScript

How to get barcode from image using JavaScript

Jul 03, 2018 am 10:24 AM
js

This article focuses on introducing JavaScript to recognize barcodes in pictures. The code is simple and easy to understand, very good, and has reference value. Friends who need it can refer to it

I am currently working on a retail supermarket project. However, you need to enter the data yourself. There are even a few supermarkets with more than 1,000 products. It is definitely not practical to enter them one by one by yourself. Therefore, it is much more efficient to consider scanning the barcode of the product and obtaining the product information based on the barcode.

Obtaining product information based on barcodes. There are many APIs on the Internet. Generally, the fee is not high and can be used directly. I will skip it here.

Here we focus on JavaScript recognition of barcodes in images.

Open source library quaggaJS

Project address: https://github.com/serratus/quaggaJS

Thanks here The master provided such a great js library, so that my idea can be realized!

The use of this library is also very simple. There are rich explanations on github, but I only used one of the functions of scanning barcode pictures and obtaining barcodes, so I just listed the functions I need. For an example, if you have other needs, you can find it in the link above.

Page part

<html>
<body>
<section id="container" class="container">
 <p class="controls">
   <fieldset class="input-group">
     <input type="file" accept="image/*;capture=camera">
     <button>Rerun</button>
   </fieldset>
 </p>
 <p id="result_strip">
  <ul class="thumbnails"></ul>
 </p>
 <p id="interactive" class="viewport"><canvas class="imgBuffer" width="800" height="566"></canvas><canvas class="drawingBuffer" width="800" height="566"></canvas><br clear="all"></p>
</section>
<script src="jquery-1.11.0.min.js"></script>
<script src="quagga.min.js" type="text/javascript"></script>
<script src="file_input.js" type="text/javascript"></script>
</body>
</html>
Copy after login

JavaScript part

$(function() {
   $(".controls button").on("click", function(e) {
    var input = document.querySelector(".controls input[type=file]");
    if (input.files && input.files.length) {
      Quagga.decodeSingle({
        inputStream: {
          size: 800 // 这里指定图片的大小,需要自己测试一下
        },
        locator: {
          patchSize: "medium",
          halfSample: false
        },
        numOfWorkers: 1,
        decoder: {
          readers: [{
            format: "ean_reader",// 这里指定ean条形码,就是国际13位的条形码
            config: {}
          }]
        },
        locate: true,
        src: URL.createObjectURL(input.files[0])
      }, function(result) {
         var code = result.codeResult.code,
          $node,
          canvas = Quagga.canvas.dom.image;
        // 将扫描得到的条形码打印出来
        $node = $(&#39;<li><p class="thumbnail"><p class="imgWrapper"><img  src="/static/imghw/default1.png"  data-src="https://img.php.cn/upload/article/000/000/009/9902c79aff6010a5baf49fce369d00ec-0.jpg"  class="lazy"  / alt="How to get barcode from image using JavaScript" ></p><p class="caption"><h4 class="code"></h4></p></p></li>&#39;);
        $node.find("img").attr("src", canvas.toDataURL());
        $node.find("h4.code").html(code);
        $("#result_strip ul.thumbnails").prepend($node);
      });
    }
  });
});
Copy after login

Effect display

How to get barcode from image using JavaScript

The above is the entire content of this article. I hope it will be helpful to everyone’s study. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

Native JS Canvas code to implement the backgammon game

jquery to achieve the horizontal scrolling effect of images

The above is the detailed content of How to get barcode from image using JavaScript. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to use JS and Baidu Maps to implement map pan function How to use JS and Baidu Maps to implement map pan function Nov 21, 2023 am 10:00 AM

How to use JS and Baidu Map to implement map pan function Baidu Map is a widely used map service platform, which is often used in web development to display geographical information, positioning and other functions. This article will introduce how to use JS and Baidu Map API to implement the map pan function, and provide specific code examples. 1. Preparation Before using Baidu Map API, you first need to apply for a developer account on Baidu Map Open Platform (http://lbsyun.baidu.com/) and create an application. Creation completed

Recommended: Excellent JS open source face detection and recognition project Recommended: Excellent JS open source face detection and recognition project Apr 03, 2024 am 11:55 AM

Face detection and recognition technology is already a relatively mature and widely used technology. Currently, the most widely used Internet application language is JS. Implementing face detection and recognition on the Web front-end has advantages and disadvantages compared to back-end face recognition. Advantages include reducing network interaction and real-time recognition, which greatly shortens user waiting time and improves user experience; disadvantages include: being limited by model size, the accuracy is also limited. How to use js to implement face detection on the web? In order to implement face recognition on the Web, you need to be familiar with related programming languages ​​and technologies, such as JavaScript, HTML, CSS, WebRTC, etc. At the same time, you also need to master relevant computer vision and artificial intelligence technologies. It is worth noting that due to the design of the Web side

How to create a stock candlestick chart using PHP and JS How to create a stock candlestick chart using PHP and JS Dec 17, 2023 am 08:08 AM

How to use PHP and JS to create a stock candle chart. A stock candle chart is a common technical analysis graphic in the stock market. It helps investors understand stocks more intuitively by drawing data such as the opening price, closing price, highest price and lowest price of the stock. price fluctuations. This article will teach you how to create stock candle charts using PHP and JS, with specific code examples. 1. Preparation Before starting, we need to prepare the following environment: 1. A server running PHP 2. A browser that supports HTML5 and Canvas 3

Essential tools for stock analysis: Learn the steps to draw candle charts with PHP and JS Essential tools for stock analysis: Learn the steps to draw candle charts with PHP and JS Dec 17, 2023 pm 06:55 PM

Essential tools for stock analysis: Learn the steps to draw candle charts in PHP and JS. Specific code examples are required. With the rapid development of the Internet and technology, stock trading has become one of the important ways for many investors. Stock analysis is an important part of investor decision-making, and candle charts are widely used in technical analysis. Learning how to draw candle charts using PHP and JS will provide investors with more intuitive information to help them make better decisions. A candlestick chart is a technical chart that displays stock prices in the form of candlesticks. It shows the stock price

How to use JS and Baidu Map to implement map click event processing function How to use JS and Baidu Map to implement map click event processing function Nov 21, 2023 am 11:11 AM

Overview of how to use JS and Baidu Maps to implement map click event processing: In web development, it is often necessary to use map functions to display geographical location and geographical information. Click event processing on the map is a commonly used and important part of the map function. This article will introduce how to use JS and Baidu Map API to implement the click event processing function of the map, and give specific code examples. Steps: Import the API file of Baidu Map. First, import the file of Baidu Map API in the HTML file. This can be achieved through the following code:

How to use JS and Baidu Maps to implement map heat map function How to use JS and Baidu Maps to implement map heat map function Nov 21, 2023 am 09:33 AM

How to use JS and Baidu Maps to implement the map heat map function Introduction: With the rapid development of the Internet and mobile devices, maps have become a common application scenario. As a visual display method, heat maps can help us understand the distribution of data more intuitively. This article will introduce how to use JS and Baidu Map API to implement the map heat map function, and provide specific code examples. Preparation work: Before starting, you need to prepare the following items: a Baidu developer account, create an application, and obtain the corresponding AP

PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts PHP and JS Development Tips: Master the Method of Drawing Stock Candle Charts Dec 18, 2023 pm 03:39 PM

With the rapid development of Internet finance, stock investment has become the choice of more and more people. In stock trading, candle charts are a commonly used technical analysis method. It can show the changing trend of stock prices and help investors make more accurate decisions. This article will introduce the development skills of PHP and JS, lead readers to understand how to draw stock candle charts, and provide specific code examples. 1. Understanding Stock Candle Charts Before introducing how to draw stock candle charts, we first need to understand what a candle chart is. Candlestick charts were developed by the Japanese

The relationship between js and vue The relationship between js and vue Mar 11, 2024 pm 05:21 PM

The relationship between js and vue: 1. JS as the cornerstone of Web development; 2. The rise of Vue.js as a front-end framework; 3. The complementary relationship between JS and Vue; 4. The practical application of JS and Vue.

See all articles